Replying to My New Trick...?

Before this ski season started, me and my friend made a deal. It was that when he tried an underflip, then i had to try somethin off axis or flipped or somethin as well. WELL, last weekend on sunday he did one but i wasn't there. SO now i gotta do somethin. I need help choosing the trick though. I can do anything on a trampoline or diving board, and have done a couple backflips on skiboards just for fun. What should i do? Skiing wise, i can do up to 7 grabs pretty good and clean. So what should i throw? I'm really leaning towards a lincoln loop because they wouldn't hurt as much to under rotate as a backflip does...maybe a cork 7? misty? I really gotta do this and i want to as well cuz i wanna progress obviously and that's the reason i made the deal. to force me to progress... but i really dont wanna get hurt too bad cuz i'm goin on a ski vacation for a week the week AFTER this weekend so i really wanna be healthy for that cuz i've been lookin forward to it for a long long time. So any help...i'd appreciate. Thanks.